colgate



2 SheetsSheet 2.

(No Model.)

A. E. GOLGATE. MAGNETO ELECTRIC MACHINE.

No. 431,559. Patented July 8, 1890.v

g/MESSES uvvmrol? ATTORNEYS man.

UNITED STATES PATENT OFFICE.

ARTHUR E. COLGATE, OF NEWV YORK, N.Y., ASSIGNOR TO F. G. OTTO & SONS,

' OF SAME PLACE.

MAGNETO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 431,559, dated July 8,1890.

Application filed March 27, 1890. Serial No. 345,475. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR E. OoLeATE, a resident of the city of New York, in the county and State of New York, have invented an Improved Generator of Electricity for Medicinal and Analogous Purposes, of which the following is a specification, reference being had to the accompanying drawings, forming part thereof, wherein Figure 1 is a vertical cross-section of my improved generator of electricity. Fig. 2 is atop view of the same partly broken away. Fig. 3 is a diagram showing the relation of the parts.

This invention relates to a new instrument for generating intermittent currents of electricity for medical and analogous purposes; and it consists in the new combination of parts, hereinafter more fully described.

The instrument shown in the annexed drawings is constructed analogous to a dynamo, being composed of armature-coils A A, that are carried by a shaft B, which has its bear? ings in a frame C, said shaft being geared by a pinion a and toothed wheel I), with a driving-shaft D, having a handle (1, so that byrevolving the shaft D the shaft 13 will also be turned, and with it the armature-coils A. The armature-coils A move between pole-pieces E, that are stationarily secured in the frame 0. F is a multiple magnet held on the frame 0, so as to embrace the pole-pieces E. The frame 0 has a form of a box with a hinged or otherwise movable end e, which, when let down, will allow the magnetF to be moved in or out at pleasure, so that a greater or less portion of said magnet shall embrace the pole-pieces. Upon one end of the shaft B is held upon an insulated block f a commutator G, part of which is a continuous metal ring at g, from which lips h project.

'6 and j are two springs or brushes, the spring 2' being in continuous contact with the continuous metal ring g, while the spring j is alternately in contact, during the rotation of the shaft B,with the insulated block f and with the metallic lips h of the commutator G. The commutator G connects by a wire I with the outer end of one of the coils A, a wire m connecting the inner end of said coil with the outer end of the next coil A, and from the inner end of this second coil A a wire a extends into contact with the shaft B. From the shaft B a wire 0 runs to the brush j, and a branch 19 extends from the wire 0 to one of the handles II. The other handle I connects by a wire (1 with the brush '6.

The operation of this instrument is as follows: WVhen a patient holds the two handles II I in his hand and the shafts D and B are revolved, the current passes, when the brush j is in metallic contact with one of the lips h, through the wire 0, brush 7', commutator G, wire Z, armature-coils A, and shaft B, as shown by the arrows r in Fig. 3. Thus at this stage no part of the current passes to or through the handles HI; but when the brush j isin contact with the insulated block f the current passes from the shaft B, through part of the wire 0, thence through the wire 19, handle I-I, through the person of the patient, handle I, wire q, brush 1', commutator G, wire 1, and armature-coils A, the deflection of the current thus produced being indicated by the four arrows s in Fig. 3. Thus it will be seen that, according to the greater or less proximity of the lips h, a greater or less number of strokes or shocks will pass through the patient. I prefer to arrange the lips 7t on the commutator in alignment with the coils A A, so that when these coils are in position relative to the pole-pieces E to give the strongest cur rent the lips It will be out of contact with the spring or brush j, thus giving the benefit of the greatest strength of the current to the pa tient. By moving the magnet F the strength of current imparted to the patient can be regulated at will.

I have found that by connecting the shaft D by wire t with a binding-post a and securing either one of the handles H I to this binding-post, the other handle meanwhile remaining in the position shown in Fig. 3, a current will also be received-a fact which is due to the metallic connection of the wheels to b. The toothed wheel I) is shown to be grooved, and a rubber band o is laid in the groove, the ob ject being to render the action of the toothed wheels noiseless, which object I secure by causing the rubber band 1; to bear against the edge of the pinion a.

The main feature of my invention will of course be utilized, even if the shafts B D are pieces E, adjustable magnet F, and springs i the one being in continuous metallic contact with the commutator G, the other in intermittent metallic contact therewith, and with the system of conductors and handles for uniting said parts, substantially as herein shown and described.

ARTHUR E. COLGATE.

Witnesses:

HARRY M. TURK, LIVINGSTON EMERY. 

